Floating cutter and holder.



F. DIEBOLD. I

FLOATING CUTTER AND HOLDER.

APPLICATION FILED JUNE 30.1915.

1,170,224. Patented Feb. 1, 1916.

L aw/0% M -7 y THE COLUMBIA PLANbURAPH 120., WASHINGTON, D. c

ran sT 'rEs PATENT orrron.

FRANK mEBoLn, or MUSKEGON, MICHIGAN.

FLOATINGCUTTER AND HOLDER.

Specification of Letters Patent.

Patented Feb. 1, 1916.

Application filed June 30, 1915. Serial No. 37,365.

V the art to which it appertains to make and use the same. o

This invention relates to a floating cutting tool adapted to be used in finishing, the outside diameter of cylindrical work to exact size on a lathe or other like machine.

It is the object and purpose of the invention to provide a tool of this character which may be applied to standard turning machines and which will include a support carrying a loose or floating cutting tool or tools thereon which will have substantially free movement with respect to the support but which when applied to a cylinder that has been cut down nearly to proper size will find its position and center itself with respect to said cylinder, the cutting elements of the cutter in opposition to each other being forced to cut ofl equal amounts from' the cylinder thereby finishing it to exact size.

Other objects and purposes consisting of new and useful features of construction and operation are included in the invention and will appear as the description of the embodiment shown in the accompanying drawing progresses.

In the drawing: Flgure 1 1s a plan view of the tool support with the floating cutter in position thereon. Fig. 2 is a side elevation. Fig. 3 is an end elevation with parts broken away and shown in section to disclose details of construction. Figs. 41 and 5 are detail views of elements used on the support for properly positioning the cutter; and Fig. 6 shows a plan and front and end elevation of a binding wedge for holding the immediate cutting tools in position.

Like reference characters refer to like parts throughout the several views of the drawing. The support for the floating cutter consists of a substantially semi-circular member 1 turned outwardly at each end, the front end having a base member 2 connected therewith and the rear end being pivotally connected to a similar member '8 by a pivot pin on to the ends of studs 9.

fias shown. Ihe connection of the front of the support to. the base 2 is by means of a diagonally positioned screw 5 which causes the support 1 to be drawn tightly against a shoulder on the base 2 as shown in Fig. 3 In practice the support may be applied to the carriage of a turning lathe, the members 2 and 3 being received in the slots of said bed or otherwise properly connected in place. The pivotal connectionat 4 of the support to the rear member 3 is for the purpose of turning the support and anything that may be carried thereby to the rear when the tool is not being used, it being understood of course that adisconnection with the front base member 2'is first had by removing the screw 5.

The floating cutter device includes a substantially semi-circular metal section 6,'the lower ends of which rest upon hardened sleeves 7 threaded on to a plug 8 formed integrally with but positioned eccentrically with respect to the axis of the stud 9. These studs pass through openings in the support 1 andthe shoulder formed between parts 8 and 9 is drawn tightly against a side of the support by means of the nuts 10 threaded Each of the sleeves 7 at its outer end is provided with a head 11 having a diameter larger than the outside'diameter of the sleeve. The member 6 at each end on the'underside thereof has" an inset'hardened plate 12 riding on the sleeve 7 and the heads 11 'ofthe sleeves serve to prevent any lateral displacement of said member. Ina similar manner a sleeve 7 is supported adjacent the upper end support 1, the head 11 thereof bearing against the face of the member. In practice member 6 is positioned on the lower of the sleeves 7 and the stud carrying the upper more the heads 11 on the sleeves are screwed in position so that they will bear lightly against the face of the member 6 permitting the movement of the member with respect to the support and the stud 7 but not leaving it loose for undue vibration. To bring said member 6 lightly against the heads 11 of the sleeves 7 screws 16 are passed through the support 1 and bear against the hardened disks 17 attached to the inner face of the member. These screws may be adjusted to any desired position and locked by ordinary machine nuts 16. To prevent the disengagement of said member from the support 1 when the device as a whole is turned to the rear about the pivot 4 pins 18 are secured to and project laterally from the support 1 and in the path of movement of said member as it moves back and forth between the sleeves 7.

The cutters are shown at 19 and are positioned at diametrically opposed points on the member 6, being retained in place by blocks 20 inserted in depressions in said member and having a beveled edge bearing against a like adjacent edge 011 the cutter. The blocks may be held in place by any suitable fastening means such as screws or the like and the cutters may be adjusted to position by set screws 19 bearing against the outer end thereof.

It is desirable that sleeves 7 which once in place on the threaded'stud 8 shall remain firmly in such positions. To accomplish this I have bored the plug 8 inwardly for a distance and interiorly threaded it to receive the screw threaded pin 21 which at its inner end is tapered or conical as shown at 22. The pin passes through an opening in the head 11 of sleeve 7 and its conical end bears against the inner inclined ends of plugs 23 which are seated movably in an opening drilled transversely through part 8, the outer ends of said plugs being screw threaded to correspond with the threading on the part 8. After a sleeve 7 has been turned to a desired position on a plug 8 the screw 21 is then operated, its conical end 22 bearing against the plugs 23 and forcing them out wardly against the inner threaded surface of the sleeve thereby locking it firmly in position.

Any cylindrical shape having a diameter slightly larger than the distance between the cutting points of the tools 19 may be passed through the support and operated upon by the cutting tools, the floating member 6 adjusting itself with respect to the article worked upon so that each cutter 19 cuts equally from the member worked upon. The support 1 being attached to the lathe carriage is moved lengthwise of the work automatically as the lathe is operated.

WVith this construction of floating cutter a large number of pieces of identical size may be finished very rapidly as will be readily understood. The tool is not limited to any special type of lathe but can be used on turret lathes as well as ordinary types of lathes. By reason of the hardened members 12, 13 and 17 and the hardened sleeves 7 there is little or'no danger of the tool getting out of adjustment from destruction of the wearing surfaces between the support and the floating cutter. The construction is very durable and eiiicient and may be manufactured at a comparatively low cost.

Slight changes in minor detail may be resorted to without departing from the invention which is defined in the appended claims and which include all modifications in structure coming within the scope of the claims.

I claim 1. In combination, a support comprised of a substantially semi-circular member adapted to be attached to a lathe carriage, members projecting laterally from the support and a cutter member loosely received be tween said'members, said cutter member comprised of a substantially semi-circular section and having diametrically opposed cutters mounted thereon with their cutting ends extended toward each other.

2. In combination, a support comprised of a substantially semi-circular member adapted to be attached to a lathe carriage, studs passing through the support and having eccentrically connected plugs projecting thereon projecting to one side of the support, a cutter member having cutters projecting inwardly therefrom loosely mounted between the plugs and means to retain the cutter member on the support.

3. In combination, a support of substantially semi-circular outline, studs passing through the support and secured thereto, eccentric plugs on the studs projecting to oneside of the support, sleeves having heads of larger diameter mounted on the studs, a semi-circular cutter member loosely positioned between'said sleeves and retained by the heads, and means to adjust the studs to varying positions, substantially as described. 7 I. In combination, a support of semi-circular outline, base members at the feet thereof, said support being pivotally'connected to the rear base member and detachably connected to the front base member, a pair of studs in horizontal alinement extending through and secured to the support, a similar stud similarly secured atthe upper part of the support, threaded plugs eccentrically connected to the studs and projecting to one side of the support, sleeves having heads of larger diameter threaded on to the studs, a semi-circular cutter member-supported on the lower sleeves and lightly bearing against the upper sleeve and loosely positioned between the support and the heads of the sleeves, cutters mounted on the cutter member and pins pro ecting laterally from the support at each edge of the cutter member.

5. In combination, a support, a plurality ofeccentrically mounted cylindrical plugs projecting from one side of the support, In testimony Where f I afiix my signature sleeves having enlarged heads threaded on in presence of two Witnesses.

to the plugs, means to lock the sleeves in po- FRANK DIEBOI D sition on the plugs, and a cutter member having a plurality of radially extending cutlVitnesses:

ters loosely positioned on and between the FRANK Buss,

sleeves, substantially as described. ALBERT A. GRIFFIN.

Copies of this patent may be obtained for five cents each, by address'ing'the Commissioner of Patents, Washington, I). C. 

